.box{
	width: 1200px;
	/*height: 300px;*/
	border: 1px solid black;
	margin: 20px auto;
	font-size: 16px;
	box-sizing: border-box;
}
.item li{
	width: 20%;
	height: 50px;
	line-height: 50px;
	border-bottom: 1px solid grey;
	border-right: 1px solid grey;
	float: left;
	box-sizing: border-box;
	text-align: center;
}
#img-list>li{
	width: 250px;
	height: 200px;
	float: left;
	margin: 20px 24px;
	border: 1px solid grey;
	box-sizing: border-box;
}
#img-list>li>img{
	width: 100%;
	height: 100%;
}